### Brain Teasers

# 8, 13, 8, 7, 8 ...

What number comes next in this series?

8, 13, 8, 7, 8, ___, ___

8, 13, 8, 7, 8, ___, ___

### Answer

7, 7The series is the number of letters required to spell the regular shapes (triangle, quadrilateral, pentagon, hexagon, heptagon, octagon, nonagon, ...)

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## Comments

An almost impossible teaser. I would love to know how many people could solve this without looking at the answer. By the way, the shapes listed are polgons and not necessarily regular.

does shape mean enclosed? cause then you either need 3,4 at the beginning for dot and line (they ARE shapes) or you need 5,9, at the beginning for circle and semicircle. good teaser though, very creative

yes, about regular polygons, technically if they were regular, you would need square, not quadrilateral (regular plygons, if im not mistaken have all equal angles and all equal sides, so 4 = square, not a parallelogram or rectangle or rhombus)

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